/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkAnimCodecPlayer_DEFINED
#define SkAnimCodecPlayer_DEFINED

#include "include/codec/SkCodec.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSize.h"

#include <cstdint>
#include <memory>
#include <vector>

class SkImage;

class SkAnimCodecPlayer {
public:
    SkAnimCodecPlayer(std::unique_ptr<SkCodec> codec);
    ~SkAnimCodecPlayer();

    /* *
     * Returns the current frame of the animation. This defaults to the first frame for
     * animated codecs (i.e. msec = 0). Calling this multiple times (without calling seek())
     * will always return the same image object (or null if there was an error).
     */
    sk_sp<SkImage> getFrame();

    /* *
     * Return the size of the image(s) that will be returned by getFrame().
     */
    SkISize dimensions() const;

    /* *
     * Returns the total duration of the animation in milliseconds. Returns 0 for a single-frame
     * image.
     */
    uint32_t duration() const
    {
        return fTotalDuration;
    }

    /* *
     * Finds the closest frame associated with the time code (in milliseconds) and sets that
     * to be the current frame (call getFrame() to retrieve that image).
     * Returns true iff this call to seek() changed the "current frame" for the animation.
     * Thus if seek() returns false, then getFrame() will return the same image as it did
     * before this call to seek().
     */
    bool seek(uint32_t msec);


private:
    std::unique_ptr<SkCodec> fCodec;
    SkImageInfo fImageInfo;
    std::vector<SkCodec::FrameInfo> fFrameInfos;
    std::vector<sk_sp<SkImage> > fImages;
    int fCurrIndex = 0;
    uint32_t fTotalDuration;

    sk_sp<SkImage> getFrameAt(int index);
};

#endif
